On Tuesday 09 September 2008 13:57, KAMEZAWA Hiroyuki wrote:> On Mon, 8 Sep 2008 20:58:10 +0530>> Balbir Singh <balbir@linux.vnet.ibm.com> wrote:> > Sorry for the delay in sending out the new patch, I am traveling and> > thus a little less responsive. Here is the update patch>> Hmm.. I've considered this approach for a while and my answer is that> this is not what you really want.>> Because you just moves the placement of pointer from memmap to> radix_tree both in GFP_KERNEL, total kernel memory usage is not changed.> So, at least, you have to add some address calculation (as I did in March)> to getting address of page_cgroup. But page_cgroup itself consumes 32bytes> per page. Then.....

Just keep in mind that an important point is to make it more attractiveto configure cgroup into the kernel, but have it disabled or unused atruntime.